Should it not be 1: 1 since both practically mean the same?

If the ball were thrown from the ground or even landed at an equal height (40m here), then yes, the time would be a 1:1 ratio of flight to fall.

But the ball is thrown from a height of 40m, so it will take longer to hit the ground.

For example, while it may take, say, 3 seconds to go up to its max height and 3 seconds to reach it's original height again, it may take 4 more seconds to finally reach the ground.

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia